ib_find_pkey(9)

okay bestie, welcome to the ib_find_pkey(9) page in the Kernel API Manual — this is the one where the main character is a function that finds a PKey table index. periodt. 💅

💖 NAME 💖

ib_find_pkey — returns the PKey table index where a specified PKey value occurs. no cap, that’s literally the whole glow-up. ✨

✨ SYNOPSIS ✨

this is the signature, and yes she’s iconic, so keep her exact:

       int ib_find_pkey (struct ib_device *device , u32 port_num , u16 pkey ,
       u16 *index );

🎀 ARGUMENTS 🎀

okay so here’s the vibe check on every argument, and not a single one is getting left behind:

• device — the device to query. this is the one you point at. 🫶
• port_num — the port number of the device to search for the PKey. yes, port number, not a vibe. 🌸
• pkey — the PKey value to search for. the actual thing we’re hunting. 🔍
• index — the index into the PKey table where the PKey was found. this is where the found result goes, iykyk. ✨

🔗 SEE ALSO 🔗

this function does not exist in a vacuum, bestie — here’s the whole group chat from the kernel file ./drivers/infiniband/core/device.c:

• rdma_dev_access_netns(9)
• rdma_dev_has_raw_cap(9)
• ib_device_put(9)
• _ib_alloc_device(9)
• ib_dealloc_device(9)
• ib_port_immutable_read(9)
• ib_register_device(9)
• ib_unregister_device(9)
• ib_unregister_device_and_put(9)
• ib_unregister_driver(9)
• ib_unregister_device_queued(9)
• ib_register_client(9)
• ib_unregister_client(9)
• ib_get_client_nl_info(9)
• ib_set_client_data(9)
• ib_register_event_handler(9)
• ib_unregister_event_handler(9)
• ib_query_port(9)
• ib_device_set_netdev(9)
• ib_query_netdev_port(9)
• ib_device_get_by_netdev(9)
• ib_enum_roce_netdev(9)
• ib_enum_all_roce_netdevs(9)
• ib_device_enable_gid_updates(9)
• ib_device_disable_gid_updates(9)
• ib_query_pkey(9)
• ib_modify_device(9)
• ib_modify_port(9)
• ib_find_gid(9)
• ib_get_net_dev_by_params(9)

later, bestie! this page is source/version ./drivers/infiniband/core, dated October 2026, and it’s the ib_find_pkey(9) manual — slay 💅✨